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APPLICATION FILED NOV. 3, I917.

Patented July 15, 1919.

CUTLER D. KNOWLTOIN', OF ROOKIPORT, MASSACHUSETTS, mIGNQB, ,BY MESNE ASSIGNMENTS, TO UNITED SHOE MACHINERY CORPORATION. OF PATTERSON, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

nnsrunn'r MOUNTING non. m'ncnmnnv.

Application filed November 3, 1917. Serial No. 200,080.-

To all whom it may concern:

Be it known that I, CUTLER D. KNOWLTON,

i' a citizen of the United States, residing at Rockport, in the county of Essex and State of Massachusetts, have invented certain Improvements in Resilient Mountings for Machinery, of which the following description,

.m connection with the accompanying drawmachine for trimming shoes.

ings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to trimming machines and it is disclosed as embodied in a The general object of the invention is to provide means for eliminating the undesirable and destructive vibration "characteristic of various high speed machines, which will be especially well adapliioild for application to machines such as" mac es for trimming the sole edges of shoes without any sacrifice of their utility. Ithas been found that sole edge trinnning machinery is singularly sensitive to vibration. Under the present .practice the shde is freely held in the hand of the operator,

who determines the depth and direction of cut by eye, and even a slight degree of vibration in the machine will cause a wavy effect to appear on the sole edge, damaging the shoe. v

This difliculty has led to the=installation of braces on such machines running to elements of the building in which the machine is placed in order to minimize the vibration arising in the machine. It has become the custom to send out several turnbuckles for braces as regularequipment of certain machines, and it is a very general custom among operators to add more. Machines have been found to which the trimmer had attached more than fifteen braces running to floor, walls and ceiling.

Moreover, shoe manufacture is frequently conducted in old or wooden buildings, which are too lightly constructed to accommodate to'the best advanta e the machinery placed in them, and it has een found that no matter how accurately a machine may be balanced, enough vibration is communicated'to it in many buildings through the floor to preclude the accuracy of the trimming o r-' ation. It 1s also true that an improperly aling mechanism.

Specification of Letters Patent. Patented fly 15', 1919.

anced machine will transmit its own vibration through an unstable building to other machines.

It is a'particular object of my invention to provide satisfactory means for eliminating vibration from every such source and an important feature of the invention is a novel shock absorbing mountingfor the machine to absorb the vibration transmitted from the building, or arising in the machine, and to be set up in the machine in this direction. Another feature resides in means for damping out vibrations exlstlng m or transmitted to the machine. In the machine shown, the resilient mounting contains fricof so that free independent vibration cannot ,tion members which quigkly' consume any vibrational energy that may be transmitted to it.

Another important feature resides in a mounting for the machine which is resilient in one'dlrection and-is arranged divert a shock in a transverse directlon into the direction of resilience, so that the energy of the diverted shock will be consumed by the resilient structure. It is thus possible to absorb energy of shock coming to the mounting in any direction withoutsacrificing the advantages inherent in rig1d1ty.

These and'other features of the invention" comprising certain arrangements and 'combinations of parts will be bestfunderstobd I I from the following description of a pre f purposes of illustration and shown ink the ferred embodiment thereof, Eselected for accompanying drawings in which, Figure 1 is a side elevation, and

Fig. 2 is a detail of the vibration absorb- The'base 10 carrles a column 12 having a, I counter-shaft 14 carrying two pulleys 16,

18 which drive the fore'part and shank cutter shafts 20, 22 respectively. The counter shaft 14 is connected by a double universal oint 24 with a driving shaft 26 carrying tight and loose pulleys. 28, 30 respectively.

This shaft is mounted in abracket 32 attached to the floor. v

The base 10 is resiliently mounted on the floor. A sub-base 34 rests on the floor and the sub-base 34 and the base 10 have a convenient number of opposed concave seats 36 10 in each pair of which are mounted a pair of clam-shell-likemembers 38. The exterior surfaces of the members 38 fit the concave surfaces of the seats 36, which are preferably spherical.

The two opposed members 38 may be 1 hinged together as at 40, and a spiral spring 42 is mounted between them in seats 44. The trimming springs 42, and the transmission of vibration to the'machine from the structure of the building itself is materially reduced.

' The joint at 24 prevents the slight relative movement which takes place between the floor and the machine from interfering with v the transmission of rotation to shaft 14.

When the floor to which the machine is more nearly rigid connection in the horizontal direction is therefore permissible. A horizontal jar will cause the. two members 38 to rotate slightly as one member, sliding on the seats 36. This movement raises the .base' 10 slightly but the machine tends to settle back into a normal position, and the friction on the seats 36 consumes much of the energy of the shock. Relative movement of the members '38" toward or from. each other will have a small component of'horithe mounting diverts a portion of a horizon zontal relative movement of the bases 10 and 34,; since such a movement changes the composite shape. of the members 38. This component w1ll,-however, be very small. The horizontal resilience of the mounting is therefore considerably less. than its vertical resilience. The relative vertical move-, ment of the bases resulting from the horizontal shock will be absorbed partly by friction and partly by the springs in their direction of maximum efi'ectiveness, so that tal shock into a vertical direction and destroys the energy of the vertical compomachine is therefore supported conjointly. by hinge pins 40 and theranged in a registerin 1 and conforming to eac cup of the pair to vantage of considerable rigidity in mounting. The action is similar to that of a pendulum suspension consisting of a spiral spring. A vertical jar to the point of suspens on-is largely damped out by the springv and does not reach the pendulum bob.

horizontal jar to the pointof suspension raises the pendulum slightly and is partly thus transformed into a vertical jar which is damped out by the spring. The pendu 111m bob, however, has no horizontally rigid connection whatever with its point of support, whereas the present horizontal connection has considerable rigidity.

- Having described my invention, what I claim as new and desire to secure by Let ters Patent of the United States is nent, without entirely sacrificing the ad- 7 1. A- mounting for machinery, compris I A ing' a machine base having apluralityof inverted segmental spherical cups in its bottom' surface, a resilient load-sustaining spheroidal unit arranged in each of sai cups, and a pluralit of segmental spherical cups sustaining sai units respectively.

2. A" mounting for machinery, comprising a machine base having a plurality of in verted cups in its bottom surface, a plurality of load-sustaining cups arrangedin registration with said inverted cups respectively, and resilient load-sustaining units each arpair of said cups maintain the base displacement. I

3. In combination, a machine frame, a resilient means arranged to support the frame yieldinglyf against lateral and absorb vibrations, a rotary driving element supported otherwise than by said frame, a rotary driven element supported by the frame, and universally jointed trans mission means connecting said driving element and driven element.

4. A mounting for machinery, comprising the combinatlon with supporting means, of a'plurality of load-sustaining units arranged to rest separately on said means, and

a machine base arranged to rest. on said the latter having convex surfaces where they engage said means and the base,

and said means and base having. concave surfaces enfgaging and conforming to said convex sur aces, whereby horizontal vibrations are diverted toward vertical lines, said units being resilient in vertical lines.

" 5. A mounting-for machinery, comprising the combination with supporting means, of a .plurality of load-sustaining units arranged to rest separately on said means, and a machine base arranged to rest on said units, the

load sustaining surfaces of said means, said units'and said base being arranged to slide,

one on another, to offer frictional resistance 'to relative horizontal movement, said fr1c tional surfaces being arranged, furthermore,

to divert horizontal vibrations toward vertical lines, said units being resilient in vertical lines.

6. A mounting for machinery, comprising the combination with supporting means, of a plurality of load-sustaining units arranged to rest separately on said means, and a machine base arranged torest on said units, each of said units comprising an upper section, a lower section, a hinge member connecting said sections, and a spring arranged to coact with said sections to sustain the load, said means, said units and said base having co-active surfaces formed to utilize said springs to absorb vibrations in substantially horizontal lines.

7. A mounting for machinery, comprising the combination with supporting means, of a plurality of load-sustaining units arranged to rest separately on said means, and a machine base ar anged to rest on each of said units, the load-sustaining surfaces of said means, said units, and said base being otherwise than plane and being counterparts of each other, whereby each of the units, independently of the other or others, is caused to maintain latera registration of the base relatively to the supporting means and each of said units being resilient in substantially vertical lines.

8. A mounting for machinery, comprising the combination with supporting means, of a plurality of load-sustaining units arranged to rest separately on said means, and a machine base arranged to rest on each of said units, each of said units comprising two segmental spherical sections cap-able of relative movement, and a spring arranged to coact with said sections to sustain the load, said means and said base having cavities in which said sections, respectively are seated.

9. A mounting for machinery, comprising the combination with supporting means, of a plurality of load-sustaining units arranged to rest separately on said means, and a machine base arranged to rest on each of said units, each of said units comprising two segmental spherical sections, a hinge member connecting them, and a spring arranged to co-act with said sections to sustain the load, said means and said base having segmental spherical cavities in which said sections, respectively, are seated.

10. A mounting for machinery, comprising the combination with a machine base and a support therefor, of a plurality of resilient load-sustaining unitsarranged between the base and the support so that each unit will function independently of another, the base and support having shoulders engaging said units and arranged to utilize the latter to maintain the base against lateral displacement.

11. A machine of the class described having a base and a sub-base which have a pair of opposed spherical seats, a pair of hinged members fitting said seats and a resilient Lnember interposed between the hinged memers.

12. A mounting for machinery, compr sing the combination with a machine base and a support therefor, of a. plurality of resilient load-sustaining units arranged between the base and the support so that each unit will function independently of another,

the base and support having cups in which said units are arranged, whereby the base is maintained against lateral displacement.

In testimony whereof. I have signed my name to this specification.

CUTLER D. KNOWLTON. 

